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F. A. Q.

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Vinyl Composite Construction

                Our vinyl composite construction as used in the Omega series room is unique to the sunroom and patio room industry.   Aluminum, which is commonly used in other manufacturer’s sunrooms and patio rooms is among the worst construction materials for energy efficiency.  Aluminum conducts both heat and cold very rapidly, which makes sense when you think about it, since aluminum is commonly used in cookware!

               In contrast, Vinyl is among one of the most energy efficient building materials;  1400 times less conductive to heat and cold than aluminum, which means the vinyl room will be warmer in Spring and cooler in summer than the inside of a room constructed from aluminum.  Equally important, the frame components in C-Thru vinyl windows and doors contain numerous insulating pockets which helps increase the performance of our Omega room over traditional low-end patio rooms fabricated from aluminum.  These insulating pockets also significantly reduce the transmission of outside noises into a C-Thru Omega sunroom, which in turn improves the ambiance and usability of the room for your clients

              Unlike low-end aluminum doors and windows used in other sunrooms and patio rooms, C-Thru’s Vinyl windows and doors utilize a welded construction.  All of the headers and jambs are solidly welded into a strong one-piece frame.  This one-piece welded vinyl frame will not come loose or separate like low-end aluminum windows and doors, which are made from four separate headers and jambs held together with screws.

             For dealers located on the coast, the Vinyl construction in our Omega series rooms gives you another leg up on your competition.  In coastal applications, the salt in the air will corrode the hardware in your competitor's aluminum windows and doors, making the operation of aluminum doors and windows difficult over time.  Our Omega windows and doors contain no such hardware, therefore they are perfect for coastal applications.

             C-Thru’s unique vinyl composite patio rooms, with our welded vinyl construction, also have a much cleaner and refined look than aluminum rooms since they do not require near the amount of screws and hardware typically associated with typical aluminum construction.  The cleaner look and higher efficiency of C-Thru’s vinyl sunrooms and patio rooms means that your client’s projects will look as good 10 years from now as the day they were built.  That translates to better energy efficiency and a higher quality look now, and more resale value later should your clients choose sell their homes down the line.

 Longer Roof Panel Projections

            C-thru manufactures its roof panels with 2 lb foam unlike our competitors who typically use a softer 1 lb or 1-1/2 lb foam.  Two pound foam is stronger and more dense.  Why is this important?  It simply means that your clients can benefit from longer roof projections on C-Thru patio rooms without the need (or additional cost) for unsightly posts and beams.  In C-Thru patio rooms, you can deliver projections out to 23’.  In a similar room, Four Seasons can only achieve 16’ without adding posts and beams to help carry the roof load.  Similarly, on C-Thru’s glass roof rooms, our stronger rafters can span projections out to 20’.  Again, compared with Four Seasons glass-roofed room, their maximum span is only 15’.

           Longer projections on sunrooms and patio rooms are important, but there is another not so obvious benefit which may be even more important to your clients ….  Stronger roof panels and stronger beams mean products that are built for the long haul.  Your clients are making a major investment in their room addition. Products build to last are what your clients expect, and that’s what C-Thru delivers. 


Cardinal Insulating Glass with patented XL Edge Thermal Spacer

           Insulating glass units supplied by C-Thru are manufactured in Cardinal IG’s highly automated state-of-the-art factory, and utilize Cardinal’s unique and patented XL Edge thermal steel spacer around the perimeter edge of the glass units.  Since 1978 Cardinal has produced insulating glass units manufactured with a unique dual-seal system.  This system uses a polyisobutylene (PIB) primary seal and a silicone secondary seal.  PIB is the best material for keeping moisture out and argon in, and silicone is the ideal material to long-term structural integrity for the sealed glass unit.  Units manufactured with this dual-seal system have demonstrated a failure rate of less than 1% after 20 years in the field.  Based on decades of real-time experience in the field and in the brutal P1 lab test, where glass units are subjected to high temperature and humidity cycling while undergoing unusually high exposure to concentrated UV rays; PIB/Silicone dual-seal silicone systems last four to ten times longer than other types of sealing systems insulating glass. 
           In the grueling P1 test, conditions are generally so severe that if a glass unit survives one day in the test chamber, it is considered to be equal to one year of real-time exposure in the field.  The following table shows how other glass edge sealing systems stack up in P1 testing

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